Question
What is the approximate percentage growth of coal production in China between the period 1981-2010?
Answer: Option C
:
C
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:
C
Production in 1981= 0.6 bn tones
Production in 2010= 3.24 bn tones
Factor of Multiplication = 3.250.6 ≈ 5.5
Hence, percentage increase= (FOM-1)×100≈450%
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